Question: Who gave the{conjugate acid} of {item used} of {water torture} ?
Paraphrase: Who gave the{conjugate corrosive} of {thing utilized} of {water torment} ?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q28351510 wdt:P2283 ?X . ?X wdt:P4147 ?answer}
Answer: hydronium